journal article·2025-10

Dynamic Control of Photoresponse in VO 2 Through Phase Manipulation

Hao‐Yu Cheng, Ming‐Jyun Ye, Lu‐Hsing Chen, Yen‐Yu Wang, Shi‐Wei Chu, Yen‐Lin Huang, Yu‐Jung Lu, Kuo‐Ping Chen, Kung‐Hsuan Lin

Advanced Optical Materials· Volume 13· Issue 30
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Abstract

Abstract Vanadium dioxide (VO 2 ), a representative phase‐transition material, exhibits nonlinear optical responses during its transition from an insulating to a metallic state. By investigating the transient photoresponses of a VO 2 thin film at different temperatures, additional slow‐growth and hybrid phases are discovered between the insulating phase at low‐temperature and metallic phase at high‐temperature. The amplitude of the VO 2 photoresponse at 68 °C in the slow‐growth phase is observed to be 5.5 times greater than that at room temperature. The controllability of relaxation time is also demonstrated from a few tens of picoseconds to a few nanoseconds. The optimized conditions for all‐optical modulation applications are explored.
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Research context

OpenAlex topics: Transition Metal Oxide Nanomaterials · Advanced Memory and Neural Computing · Gas Sensing Nanomaterials and Sensors

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Department of Physics National Taiwan University No. 1, Sec. 4, Roosevelt Rd., Da'an Dist. Taipei 106319 Taiwan

Nano Science and Technology Program Taiwan International Graduate Program Academia Sinica and National Taiwan University No. 128, Sec. 2, Academia Rd., Nangang Dist. Taipei 115201 Taiwan

Institute of Physics Academia Sinica No. 128, Sec. 2, Academia Rd., Nangang Dist. Taipei 115201 Taiwan

College of photonics National Yang Ming Chiao Tung University No.301, Sec.2, Gaofa 3rd Rd., Guiren Dist. Tainan 711010 Taiwan

Institute of Photonics Technologies National Tsing Hua University No. 101, Section 2, Kuang‐Fu Rd., East Dist. Hsinchu 300044 Taiwan

Research Center for Applied Sciences Academia Sinica No. 128, Sec. 2, Academia Rd., Nangang Dist. Taipei 115201 Taiwan

Brain Research Center National Tsing Hua University No. 101, Section 2, Kuang-Fu Rd., East Dist. Hsinchu 300044 Taiwan

Department of Materials Science and Engineering National Yang Ming Chiao Tung University No. 1001, Daxue Rd., East Dist. Hsinchu 300093 Taiwan

Funding

National Science and Technology Council · Academia Sinica

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